Objective: To study effect of propofol intravenous anesthesia used in transvaginal oocyte retrieval on outcomes of in vitro fertilization and embryotransplantation.
Results Among the 49 cases who had received cryopreservation thawed embryotransplantation for 53 cycles, 11 cases achieved clinical pregnancy (with the rate of 20.8%).
结果49例进行53个周期的冻融胚胎移植，获临床妊娠11例，临床妊娠率为20.8%。
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They do this so they can select the healthiest embryo for transplantation.